# mystr1 = 'o'
# mystr2 = 'hello12345'
# # 结果：True
# print(mystr1.isalpha())
# # 结果：False
# print(mystr2.isalpha())
print(type([10,20,30]))
# list1 = ['chuan', 'zhi', 'bo', 'ke']
# t1 = ('aa', 'b', 'cc', 'ddd')
# # 结果：chuan_zhi_bo_ke
# print('_'.join(list1))
# # 结果：aa...b...cc...ddd
# print('AAaA'.capitalize())
# name_list = ['Tom', 'Lily', 'Rose']
# name_list.append('Tom')
# # 结果：['Tom', 'Lily', 'Rose', 'xiaoming']
# print(name_list) #['Tom', 'Lily', 'Rose', 'Tom']

# name_list = ['Tom', 'Lily', 'Rose']
# for item in name_list:
#     print(item)

 